CN206790169U - DC charger automatic power-off circuit - Google Patents
DC charger automatic power-off circuit Download PDFInfo
- Publication number
- CN206790169U CN206790169U CN201720613924.8U CN201720613924U CN206790169U CN 206790169 U CN206790169 U CN 206790169U CN 201720613924 U CN201720613924 U CN 201720613924U CN 206790169 U CN206790169 U CN 206790169U
- Authority
- CN
- China
- Prior art keywords
- main control
- control chip
- circuit
- output end
- automatic power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of DC charger automatic power-off circuit, its DC supply input is connected with main control chip, the power positive cathode of DC interface output end is connected with DC supply input and main control chip respectively, wherein current detection circuit and filter circuit are provided between DC interface output end and main control chip, described current detection circuit is made up of two metal-oxide-semiconductors in parallel, and two metal-oxide-semiconductors are respectively connected on main control chip；The size of DC interface output end charging current is identified by main control chip, selects one of metal-oxide-semiconductor to turn on, is charged.The utility model advantage is, when just starting to charge up, realizes that charge circuit turns on by metal-oxide-semiconductor Q1, so as to realize large current charge.With the reduction of charging current, it is switched to metal-oxide-semiconductor Q2 and realizes that charge circuit turns on, continue to charge using low current, not only may insure charging rate, while can prevent from overcharging, finally, ensures that being electrically charged battery is completely filled with by timing control.
Description
Technical field：
The utility model is related to DC charger device product technical field, refer in particular to it is a kind of have it is fully charged automatically power off it is straight
Current charge device automatic power-off circuit.
Background technology：
With the development of science and technology, the intelligent mobile terminal such as mobile phone has become the indispensable instrument of people.Current hand
The intelligent terminals such as machine are powered using lithium ion battery, when battery power consumption is complete, it is necessary to carry out DC charging to it.Institute at present
The charger used is for the ease of matching, generally use USB interface.And the charged state of current charger is typically by making
The artificial plug of user is changed, i.e., when mobile phone is connected with charger, charger starts to charge up, when mobile phone and charger point
From charger complete charge.If user forgets to separate mobile phone with charger, charger is constantly in charged state.
Even if will be discontinuously its charging under cell-phone battery electric-charge quantity full state.The lost of life of battery of mobile phone is so not only resulted in,
And potential safety hazard is likely to result in, causes battery of mobile phone to should be the danger for overcharging and heating occur, even exploding.
In order to prevent the generation of the above situation, usual charger can set battery capacity indication lamp, after battery electric quantity is full of, refer to
Show lamp greening, prompt user to pull up charger.But because if user leaves, charger is still in working condition, institute
To occur the charger that can be automatically powered off on the market at present.It is this automatically power off charger be by Control or when
Clock system, but easily there is the situation that signal sensitivity is not high, can not power off in time by the charger of Control, and
And relay is easily judged by accident after frequent use in itself.If using clock control, the charging interval of charger is controlled, can
Between occurring when charging when ending, situation that battery electric quantity is not full of.
So for the above situation, the present inventor proposes that following one kind has whether Intelligent Recognition electricity fills by research
Full automatically powers off charger.
Utility model content：
Technical problem to be solved in the utility model is that overcome the deficiencies in the prior art, there is provided a kind of DC charging
Device automatic power-off circuit, the automatic power-off circuit is according to charging current, when charging current is full of soon, by large current charge
Low current charge is switched to, then in conjunction with clock controller, is automatically powered off after the time rating that is delayed under low current charge state.
In order to solve the above-mentioned technical problem, the utility model employs following technical proposals：The DC charger is from dynamic circuit breaker
Circuit includes：DC supply input, main control chip, the DC interface output end for being charged to load, described direct current
Power input is connected with main control chip, the power positive cathode of described DC interface output end respectively with DC supply input
Connected with main control chip, wherein being provided with current detection circuit and filtered electrical between DC interface output end and main control chip
Road, described current detection circuit are made up of two metal-oxide-semiconductors in parallel, and two metal-oxide-semiconductors are respectively connected on main control chip；
The size of USB interface output end charging current is identified by main control chip, selects one of metal-oxide-semiconductor to turn on, is charged.
Furthermore, in above-mentioned technical proposal, an identification chip is also associated with described main control chip, the identification core
Piece is powered by DC supply input, and described DC interface output end signal end is connected with identification chip.
Furthermore, in above-mentioned technical proposal, described identification chip is cell phone intelligent matching chip.
Furthermore, in above-mentioned technical proposal, test interface is additionally provided with described main control chip.
Furthermore, in above-mentioned technical proposal, signal lamp is connected with described main control chip.
Furthermore, in above-mentioned technical proposal, described filter circuit is made up of the electric capacity and resistance of parallel connection.
Furthermore, in above-mentioned technical proposal, described automatic power-off circuit includes at least two groups direct currents in parallel and connect
Mouth output end, the DC interface output end can use USB interface.
After adopting the above technical scheme, the utility model advantage is, when just starting to charge up, is realized and filled by metal-oxide-semiconductor Q1
Electrical circuit turns on, so as to realize large current charge.When electricity is full of soon, with the reduction of charging current, metal-oxide-semiconductor Q2 is switched to
Realize that charge circuit turns on, continue to charge using low current.Final stage charging process is controlled finally by timing.Such one
Come, not only may insure charging rate, while can prevent from overcharging, finally, ensure to be electrically charged battery by timing control complete
It is full of.
Brief description of the drawings：
Fig. 1 is circuit diagram of the present utility model；
Embodiment：
The utility model is further illustrated with reference to specific embodiments and the drawings.
The utility model sets to be a kind of available for the DC charger to be charged to intelligent terminals such as mobile phones, the charger
An automatic power-off circuit is equipped with, makes battery to cut off charge circuit in time after fully charged by the automatic power-off circuit, stops
Only charge, so that it is guaranteed that the safety of charging, and ensure the service life of battery.
As shown in Figure 1, the DC charger automatic power-off circuit includes：DC supply input 1, main control chip 2, it is used for
To the DC interface output end of load charging.Two groups of DC interface output ends 3,3 ' are employed in the present embodiment, due to its work
Principle is identical, is illustrated so entering group one of which DC interface output end 3 below.In the present embodiment, described direct current connects
Mouth output end directly employs USB interface.
Described DC supply input 1 is connected with main control chip 2, and the power supply of described DC interface output end 3 is positive and negative
The pin LOAD1 of pole V+, V- respectively with DC supply input 1 and main control chip 2 is connected, and a loop is formed, wherein straight
Current detection circuit 4 and filter circuit 5 are provided between the negative pole end and main control chip 2 of stream interface output end 3.
Described current detection circuit 4 is made up of two metal-oxide-semiconductor Q1, Q2 in parallel, and Q1, Q2 points of two metal-oxide-semiconductors
Not Jie Ru main control chip 2 pin EN1 and EN1A；The big of the charging current of DC interface output end 3 is identified by main control chip 2
It is small, select one of metal-oxide-semiconductor Q1 or Q2 to turn on, charged.
The electric capacity C1 and resistance R7 that described filter circuit 5 has parallel connection are formed.It is filtered, is prevented by filter circuit 5
Signal interference.
The utility model can be used for charging to intelligent communication terminals such as mobile phones, so it is generally necessary to increasing an identification
Chip 6, intelligent Matching is carried out to the mobile phone of charging by identification chip 6, so as to know the mobile phone charge parameter being electrically charged.The knowledge
Other chip 6 is powered by DC supply input 1, and in described DC interface output end 3 signal end D-, D+ and identification chip 6
Corresponding pin DM1, DP1 connection.
In addition, directly being observed for the ease of user, signal lamp is connected with described main control chip 2, every group refers to
Show that lamp is logical to be made up of red, green two LEDs DS1, DS2, to show charged state.
For the utility model in use, inputting 5V direct current to DC supply input 1 first, the direct current of the input is same
When powered to main control chip 2, DC interface output end 3, identification chip 6.When by the mobile phone being electrically charged and DC interface output end 3
Connection, charging start.
When just starting to charge up, because the battery being electrically charged is generally in low battery state, now charging current is larger, charging
Voltage is higher, and main control chip 2 exports high level to metal-oxide-semiconductor Q1, and now metal-oxide-semiconductor Q1 is turned on, and charging current is realized by metal-oxide-semiconductor Q1
Loop turns on.(determine that generally charge volume reaches according to the mobile phone parameters of different specifications when being electrically charged battery and being full of soon
During 70-80%), the voltage of charging gradually reduces, when less than some numerical value, metal-oxide-semiconductor Q1 cut-offs, while metal-oxide-semiconductor Q2 is opened
Beginning to turn on, charging current realizes that loop turns on by metal-oxide-semiconductor Q2, continues to carry out low current charge to being electrically charged battery, after the completion of
Continuous charging operation.
For how to select to disconnect charging circuit, the utility model is controlled by the internal clock of main control chip 2, when
After metal-oxide-semiconductor Q2 is begun to turn on, main control chip 2 will start timing, and after being generally further continued for charging 30 minutes or so, main control chip 2 will
Cut-off loop, stop charging.
Visible from the above mentioned, using above-mentioned technical proposal, its advantage is, when just starting to charge up, is realized by metal-oxide-semiconductor Q1
Charge circuit turns on, so as to realize large current charge.When electricity is full of soon, with the reduction of charging current, metal-oxide-semiconductor is switched to
Q2 realizes that charge circuit turns on, and continues to charge using low current.Final stage charging process is controlled finally by timing.Such one
Come, not only may insure charging rate, while can prevent from overcharging, finally, ensure to be electrically charged battery by timing control complete
It is full of.
In addition, for the ease of detecting, test interface TEST-TP is additionally provided with main control chip 2 of the present utility model.It is made
With quickly being tested by the test interface before product export, to detect product with the presence or absence of bad.
Above-described embodiment is illustrated with charger for mobile phone, and the utility model is equally applicable to the straight of other electronic equipments
In current charge device, such as electric car charger.
Certainly, specific embodiment of the utility model is the foregoing is only, is not to implement to limit the utility model
Scope, all equivalent change or modifications done according to construction, feature and principle described in present utility model application the scope of the claims, all should be wrapped
Include in present utility model application the scope of the claims.
Claims (8)
1. DC charger automatic power-off circuit, including：DC supply input (1), main control chip (2), for load fill
The DC interface output end (3) of electricity, it is characterised in that：
Described DC supply input (1) is connected with main control chip (2), and the power supply of described DC interface output end (3) is just
Negative pole is connected with DC supply input (1) and main control chip (2) respectively, wherein in DC interface output end (3) and master control core
It is provided with current detection circuit (4) and filter circuit (5) between piece (2), described current detection circuit (4) is in parallel by two
Metal-oxide-semiconductor (Q1, Q2) is formed, and two metal-oxide-semiconductors (Q1, Q2) are respectively connected on main control chip (2)；Pass through main control chip (2)
The size of DC interface output end (3) charging current is identified, selects one of metal-oxide-semiconductor (Q1 or Q2) to turn on, is charged.
2. DC charger automatic power-off circuit according to claim 1, it is characterised in that：Described main control chip (2)
On be also associated with an identification chip (6), the identification chip (6) is powered by DC supply input (1), and described DC interface
Output end (3) signal end is connected with identification chip (6).
3. DC charger automatic power-off circuit according to claim 2, it is characterised in that：Described identification chip (6)
For cell phone intelligent matching chip.
4. DC charger automatic power-off circuit according to claim 1, it is characterised in that：Described main control chip (2)
On be additionally provided with test interface.
5. DC charger automatic power-off circuit according to claim 1, it is characterised in that：Described main control chip (2)
On be connected with signal lamp.
6. DC charger automatic power-off circuit according to claim 1, it is characterised in that：Described filter circuit (5)
It is made up of the electric capacity (C1) and resistance (R7) of parallel connection.
7. the DC charger automatic power-off circuit according to any one in claim 1-6, it is characterised in that：Described
DC interface output end (3) uses USB interface.
8. DC charger automatic power-off circuit according to claim 7, it is characterised in that：Described automatic power-off circuit
Including at least two groups DC interface output ends (3) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613924.8U CN206790169U (en) | 2017-05-27 | 2017-05-27 | DC charger automatic power-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613924.8U CN206790169U (en) | 2017-05-27 | 2017-05-27 | DC charger automatic power-off circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206790169U true CN206790169U (en) | 2017-12-22 |
Family
ID=60714431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720613924.8U Active CN206790169U (en) | 2017-05-27 | 2017-05-27 | DC charger automatic power-off circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206790169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980726A (en) * | 2019-03-29 | 2019-07-05 | 维沃移动通信有限公司 | A kind of charging control circuit and terminal |
-
2017
- 2017-05-27 CN CN201720613924.8U patent/CN206790169U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980726A (en) * | 2019-03-29 | 2019-07-05 | 维沃移动通信有限公司 | A kind of charging control circuit and terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102222949B (en) | Device and method for managing batteries | |
| CN204012789U (en) | Vehicle-mounted monitoring platform power administration module | |
| CN104410114B (en) | Mobile power supply | |
| CN204391863U (en) | Automatic power-off circuit and automatic power-off device for full storage battery of storage battery car | |
| CN104967156B (en) | The system that the overcurrent protection state of battery can be released | |
| CN101272057B (en) | Portable mobile charging power supply | |
| CN206517085U (en) | Intelligent discharge circuit | |
| CN207705819U (en) | A kind of multifunctional safe car emergency startup power supply with fast charge | |
| CN104467094A (en) | Charging pile | |
| CN104795864B (en) | A kind of mobile terminal and charged state detection method of accurate detection charged state | |
| CN106026265A (en) | Charging method, charging device and intelligent terminal | |
| CN206790169U (en) | DC charger automatic power-off circuit | |
| CN104167790B (en) | The charge control system and its charge control method of charger, mobile terminal | |
| CN202524069U (en) | Reverse-polarity protection circuit | |
| CN107800000A (en) | One kind automatically powers off convenient charging socket | |
| CN205429836U (en) | Intelligence low pressure auxiliary power unit and on -vehicle machine that charges of non - | |
| CN104638313A (en) | Battery recognition method for mobile handheld device | |
| CN205986253U (en) | Electric motor car battery charger's auto -power -off circuit | |
| CN201699253U (en) | Power supply seat with intelligent charging function | |
| CN208874002U (en) | A kind of intelligent charge socket | |
| CN209015317U (en) | A kind of payment charger apparatus according to the automatic out-put supply of battery voltage | |
| CN106160122A (en) | A kind of automatic power-off circuit of electromobile battery charger | |
| CN209267195U (en) | A kind of normal electric low power consumption device of lithium battery offer | |
| CN208369297U (en) | A kind of intelligent lithium ion group charger | |
| CN208738892U (en) | A kind of lithium battery charging management circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |